To move one step forward toward a Galactic distribution of planets, we present the first planet sensitivity analysis for microlensing events with simultaneous observations from space and the ground. We present this analysis for two such events, OGLE-2014-BLG-0939 and OGLE-2014-BLG-0124, which both show substantial planet sensitivity even though neither of them reached high magnification. This s...

High angular resolution (0.15”) K-band images of Neptune were obtained in August 1995, with the University-of-Hawaii adaptive optics system mounted on the 3.6-m Canada-France-Hawaii telescope. The images show bright high contrast features that are believed to be high altitude clouds. They confirm that low latitude (< 30 ̊) cloud activity has shifted since Voyager from the south hemisphere to the...

The problem of wide-angle astrometry via interferometry is to recover the two coordinates for each star from the observed delays. In the absence of atmospheric turbulence, the geometrical delay can be dened as: dG;ij(t) dj(t) di(t) = Bij(t) ŝ0 Cij . Here the geometrical delay is the di erence between the delay line lengths di and dj that is required to equalize the e ective optical paths from t...

F. Hendrick, B. Barret , M. Van Roozendael, H. Boesch , A. Butz, M. De Mazière, F. Goutail, C. Hermans, J.-C. Lambert, K. Pfeilsticker, and J.-P. Pommereau Institut d’Aéronomie Spatiale de Belgique (IASB-BIRA), Brussels, Belgium Institute for Environmental Physics, University of Heidelberg, Germany Service d’Aéronomie du CNRS, Verrieres le Buisson, France Now at: Service de Chimie Quantique et ...

Near-to-real time as well as “archive quality” Brewer total ozone observations, which are performed with well maintained and calibrated instruments over the Northern Hemisphere have been used for the validation of the total ozone column product of the Ozone Monitoring Instrument (OMI) aboard the NASA EOS-Aura satellite. During the commissioning phase of OMI, the near-to-real time ground-based d...

Direct intercomparisons between spaceand ground-based radar measurements can be a challenging task. Differences in viewing aspects between space and earth observations, propagation paths, frequencies, resolution volume size, and time synchronization mismatch between spaceand ground-based observations can contribute to direct point-by-point intercomparison errors. This problem is further complic...